TMPNAM

Section: Standard I/O Functions (3S)
Updated: August 1, 1992
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NAME

tmpnam - generate unique file name

SYNOPSIS

#include <stdio.h>

char *tmpnam(char *s);

DESCRIPTION

Tmpnam generates a string that is a valid file name and is not the same as the name of an existing file. Tmpnam generates a different string each time it is called, up to TMP_MAX times. If called more than TMP_MAX times, the behavior is undefined.

RETURN VALUE

If the argument is a null pointer, tmpnam leaves its result in an internal static object and returns a pointer to that object. Subsequent calls to tmpnam will modify this object. If the argument is not a null pointer, it is assumed to point to an array of at least L_tmpnam characters; the tmpnam function writes its result in that array and returns the argument as its value.